It glows in the dark to be stealthy

[robkelk]

No, really.

http://www.cbc.ca/news/technology/ninja ... -1.3382396]New species, the stealthy ninja lanternshark, can glow in the dark
Bluish glow cloaks inky-black fish to erase its shadow and silhouette
--
Rob Kelk
"Governments have no right to question the loyalty of those who oppose
them. Adversaries remain citizens of the same state, common subjects of
the same sovereign, servants of the same law."

- Michael Ignatieff, addressing Stanford University in 2012

[ordnance11]

"So … lanternsharks glow just enough to hide that shadow or that silhouette that they're creating."
Active camouflage
__________________
Into terror!,  Into valour!
Charge ahead! No! Never turn
Yes, it's into the fire we fly
And the devil will burn!
- Scarlett Pimpernell

[Tennie]

It's what's known as counter-illumination and diffused lighting camouflage.  Pretty interesting stuff, seeing as how the concept has military applications (e.g. Yehudi lights).